Gauging or trueing instrument



Apnl 21, 1953 T. J. SAMBORSKI 2,635,345

GAUGING OR TRUEING INSTRUMENT Filed Jan. 6, 1949' THQDDEUS d. SFIMBORS KI ATTOR Y Patented Apr. 21, 1953 GAUGING'OR 2,635,345 p H I TRUEING INSTRUMENT it Thaddeus J. Samborski, Brooklyn, NY. Application J anuary 6, 1949, Serial No. 69,419

-This-invention relates to instruments or devices for use in the operation of trueing parallel surfaces, such for example, as the runways of lathes, milling machines, shapers, marvelpower saws and other machines of this type andkind, in the operation of scraping or otherwise finishingsuch surfaces to. render the same parallel. Moreparticularly, the invention deals with an instrument or device of the character described havinga block or bar portion with means for adjustably supporting along arm thereon, with means adjustable at the free end portion of the arm forsupporting an indicator device or the finger-feeler thereof with respect to a surface to bemeasured or gauged. Still more particularly, the invention deals with an instrument, the block or bar portion ofwhich includes an adjustable angle-iron gaugeplate for abutting surfaces or undercut bevelled surfaces in the use of-the instrument. I r

"The novel features of the invention will be best understood from the following descriptions whenv taken together with theaccompanying drawing, in which certain embodiments of the invention are disclosed, and in which the separate parts are designated by, suitable reference characters in each of the views, and in which:

Fig. 1 is aside-view of' an instrument or device made according to my .inventiomindicating one method of its"use" upon'a workpiece having two undercut. bevelled surfaces, and also indicating.

in dot "and dash lines. a workpiece having two perpendicularly parallel surfaces.

iFig. 2 is; a plan view of the structure as seen in 1, detached from the workpiece, with parts ofithe constructionbroken away; and x Fig. 3 is asection on the broken line-3-3 of Fig. 1, on an enlarged scale.

In the operation of what is known as trueing runways-- or trueing in twospaced surfaces to render the same tr-uely parallel,-difiiculty has been experienced in accurately accomplishing this trueing operation, or rather in measuring or gauging the surfaces from time to time, during the scraping or finishing operations applied to the surfaces.

The object of my invention is to provide an instrument or device which can quickly and easily be adjusted to a suitable workpiece and then moved along the workpiece in gauging or measuring the accuracy of the trueing operations being performed thereon.

In Fig. 1 of the drawing, I have indicated at H), an end view of an elongated rail or runway of any type or kind of machine or apparatus, and

1 Claim. 01. ss-imf this rail or runway may be regarded as a workpiece, from the standpointiof description. This rail'is undercut and has bevelled guidesurfaces H and i2 defining side edges of the rail or runway. I havealso indicated indotand dashlines,

in Fig. 1, a rail or runway Ill having perpendicularly straight side edges II and l2. 2 i My-improved instrument or gauge device comprises an elongated block or bar I I3 having a true. and perfectly straightguide edge 14, whichjoins the upper surface I 5 of the block at one side in a. Theotheriside ll of the block is also perfectly true and paralleled bevelled or similar surface I 6.

to the side [4. Detachably mounted on-the side I7. is a supplemented gauge element l8, inthe form of an L-shaped or angle-iron strip attached: The.

degrees to the lower surface 22 of the block. Se-- cured to the block i3, and extending perpendicularly to the upper surface thereof, is a post 23.

On this post is mounted asplit sleeve 24, note Fig. 3, having a slightly bevelled socket 25 at one side thereof; The split endsof the sleeveare apertured toreceive a bolt 26, which extends centrally through the .socket,25. On the bolt, 26 is arranged a split sleeve 21, the sleeve portion 28 of. which can be seen in Figs. land 2 of the drawing. The sleeve 21 has a tapered end 29 ,fitting inthe socket 25. Adjustably mounted on the threaded end 30 of the bolt is a sleeve nut 3!; having a radially extending fingerpiece rod32 for rotating the same. Between the nut 3| and the sleeve 21 is disposed a spring 33, the latter seating 'ina .recessedcpoli-tion 34, of the nut, as clearly seen in Fig. 3. From the foregoing, it will appear that by tightening the nut 3i, adjustment of the split sleeve 24 on the post 23 is controlled, as is also adjustment of the sleeve 2'! on a long rod 35, arranged in the sleeve 21.

Adjustably mounted on the free end portion 36 of the rod 35, through the medium of a clamp screw 37, is a link 38. The link carries at its free end, a clamp bolt 39 having a knurled head 40 at one end, note Fig. 2 of the drawing. The bolt 39 adjustably supports an indicator device 40, of standard construction, and having a rounded end feeler-finger 4|, which can be swung into several positions with respect to the end 42 of the device.

The indicator device has a dial-face, as seen at 43 in Fig. 2 of the drawing, comprising a pointer 44 movable over gauge markings reading from zero to twenty in two directions, so as to gauge plus or minus thousandths of an inch, in the use of the instrument. In this way, high and low uneven surfaces on workpieces can be indicated to the operator to gauge the scraping operations to be formed on the workpiece edges, in

order to true the runway for accurate uses of the machine, of which the runway constitutes a part. In the use of the tool, the various parts are adjusted, so as to bring either the edge I4, the leg 20 or surface 18 against one-"edge of: the:

workpiece. The rod 35, link 38 and gauge device 40 are adjusted so as to bring the feeler-fing'er ll upon the other surface of theworkpieoe and to set the needle 44 at zero, where the surfaces are regarded as true. The instrument is then movedlcngitudinally along theuflrail or runway or, in other words, workpiece; and as and when: the needle or pointer 4| indicates an inaccuracy,.rthe operator is informed as to justlwhatzmust :be done in trueing upithezrunway orrworkpiece edges.

In Fig.1 of. the drawing,.I have shown in full lines, t-he arrangement of the instrument upon the workpiece'having 'theiundercut bevelled edges; Hand IZ WhiCh arevtto-zbeiscraped forztrueing; I

have alsoindicated in dot' anddashxlines per-- pendicular edges I l and 12 which are engaged by the surface I4 of i the blockuand; the'feelerfinger 4|. In this connection it: will be understood that any type or: kind of workpiece :can be gauged or measured by, my improved instrument,

from :thestandpoint of truein'g'or paralleling :anyr

two associated surfaces.- In somelinstances, the surfaces in question may vary as to contour. In

other words, a squareedge may be gauged 'with' abevelled or otherwise formed edge. It is' also:

possiblewi-th my improved instrument to support 1 and guide the block 13 alongsurfaces which are disposed angularly: with respect to each other.

Itwill'also appear that by-utilizing the long ro'd 35; surfaces of Widespread-workpieces or work'-' pieces having "wide spread edges to be gauged; as

well as workpieces'having closely arranged p-arallel surfaces; can'beitrued and gauged by my; im---- proved instrument The post '23 has a" reduced threaded end2'3 for detachable mounting on the:

block' 'fl' and the block'may have other threaded sockets adjacent end portions thereof :for disposmg the post centrally of the block as well asxa'ti' endportionsthereof, as' -is desirable: in gauging: certain types of workpieces; particularly in work in'g-or trueihgends of the runways or'workpieces. Fig; 2 of thedrawingshows the end portions of: the block 13' broken away; thus the other-sockets are not indicated in the present drawing-,2 but would be in the broken-"away portions of the blockyas'will be apparent. From the-foregoing: it-=w1ll be understood that thepostlZB has an ad'- 4 justable mounting or positioning on the block l3. Detachment of the post 23 with respect to the block also facilitates compact packaging of the complete instrument, when the same is not in use.

An instrument of the type and kind under consideration will save considerable time in the performance of the trueing operations herein-- before mentioned and further,.wouldlenable the workman .or scraper to: produce in a shorter period of time, more accurate trueing operations on'workpieces of the kind under consideration.

It will be understood that the sleeve 24 is rotat'ably adjustable around the post 23 and the sleeve 21 is rotatably adjustable around the bolt 26 Thisprovides'for any positioning of the rod with respectto the block that may be desired. Of course, the sleeve 24 is movable vertically on 'the 'po'st and longitudinally through the sleeve 21, thus controlling thetpositio-ning of the feeler 4-l-with respectto theblo'ck' I3 or the'su-pplemental gauge element: l 8.-

Havingfully described my invention, whatl claim as new and desire to secure by Letters spect to thestraight edge'of said block; said block having a surface opposed to said straight-edge and parallel thereto, asupplemental elongated gauge element detachably and adjustabl'y-- sup ported on said surface, and said elementbein'gf L-sha'ped in cross-sectional form.

THADDEUS- J1 References-Cited in the file of this patent UNITED" sTnTEsPATEN'rs:

FOREIGN PATENTS Number Country Date- 1'L041 Great Britain of .1914- 

